Sequel 15mm Through Axle
Sequel 15mm Through Axle Fits most 15mm suspension forks
20mm Through Axle Standard
20mm Through Axle Standard Fits most forks that have a 20mm axle and designed to work with Manitou, Marzocchi, White Bros, RockShox, Risse, Stratos, etc...
Lefty
Lefty Designed exclusively to be used with Cannondale's Lefty forks.
Riser
Riser Fixes fork clearance problems such as disc brake calipers coming in contact with standard racks.
Specialized
Specialized Fits 2007 and beyond Specialized 25mm through-axle dual crown forks.
DH24
DH24 To be used with 24mm axles like the Maverick fork.
Pugsley
Pugsley Fits the Surly Pugsley front fork
QR20
QR20 Designed to fit the Marzocchi QR20 series forks. Also works well with all models which have the 20mm dropout and quick release.